Collar



FIG. 1 is a perspective view of a collar showing my new design;

FIG. 2 is a front view of the collar; and,

FIG. 3 is a side view of the collar, the opposite side being a mirror image thereof.

The broken lines depict portions of the collar and form no part of the claim. 

CLAIM I claim the ornamental design for a collar, as shown and described. 